Re: [c-nsp] Opensource tool to measure Jitter for VoIP

2009-06-08 Thread Bryan Campbell
You cannot measure VOIP (sip) jitter using ICMP tools. You will only isolate false positives when the ICMP is not doing well. Route or mirror the customers traffic trough a monitoring station. Run tcpdump or Wireshark to get a pcap file that contains traffic of interest. Wash the pcap file thr

Re: [c-nsp] Cisco 3750G-24PS Issues with POE

2009-03-18 Thread Bryan Campbell
There is a standard Cisco document "Troubleshooting Power over Ethernet (PoE)" that explains the whole mess. Available via Google. b...@misn.com On Wed, 2009-03-18 at 20:15 +0200, George Stylianou wrote: > > > > > > Huh, that's weird. Are you plugging the phone directly into the switch > > or

Re: [c-nsp] MTU nightmare

2009-03-11 Thread Bryan Campbell
O.K. WAG-ing away . . . If you are willing to defend the MC hardware, so be it. But, the first thing you should do is look for a microbend in a fiber jumper. Replace all the jumpers with known good and clean jumpers. Second, replace all the copper cables with known good cables. Make sure that